This dialog is accessed by clicking the 
Justification while the Pipe tool is selected. You can Center, Top, Bottom, Left, or Right of the pipe justification.
- Horizontal Justification: aligns the edges of pipe sections horizontally, using the Center, Left, or Right side of the pipe as a reference.
- Horizontal Offset: allows you to specify an offset between where you click in the drawing area and where the pipe is drawn. This is helpful when placing piping at a fixed distance between the pipe and another component in a view.
- Vertical Justification: aligns the edges of pipe sections vertically, using the Middle, Bottom, or Top of the pipe as a reference.